How to salvage a cookie dough that is too sweet?

A little suggestion, if I may.

Mix your remaining dough with no flour, some soft butter and corn flakes. Work the dough gently and form your biscuits as usual (try using a spoon to put them on the baking tray, since the high content of butter makes the dough very soft) and finally cook them - though a bit less than usual.

You'll get biscuits with a pleasant, sweet taste, but slightly salty and in proportion to the other ingredients there will be less sugar.

I often use this trick to save dishes with an excess of a certain ingredient.

My attempt to bake chocolate chip cookies from a store bought log came out too sweet. I added a small amount of lemon zest and a few drops of peppermint flavouring to the next dough log. The cookies are much better.

A (too) sweet cookie dough can easily be disguised or complemented by adding heat like cayenne pepper. In my experience I added it to the dough and mixed it in. (Second batch of cookies.) Since you've already got your dough mixed working your dough is just going to end up with a tough dough.

I've found the combinations of chocolate, heat, and sweet or lemon, heat and sweet work very well. Make a glaze or frosting. Add the heat to disguise or complement the sweet. I don't think it's a good idea to bite directly into the heat, particularly, when one is expecting something sweet.

I'd experiment with a few of the cookies. First test - Use a very very light sprinkle of the cayenne on the raw cookie dough, press it in so it doesn't just burn on the surface, bake the cookie, frost, taste. Second test - separate some of the glaze or frosting from the main source, add a very very light sprinkle of cayenne to the glaze or frosting, mix thoroughly, frost a baked and cooled cookie, taste. Adjust to your preference.

You should end up with heat but that is an after effect. Sweet with chocolate or sweet with lemon are the first impressions, a few chews and one becomes aware of the heat.

When my chocolate cookie dough was too sweet, I put crushed walnuts and hazelnuts on top of the dough before I baked them, and when they came out of the oven I sprinkled a tiny bit of salt on top of the cookies.

This helped tone down the sweetness a lot.

I made my sugar cookie dough too sweet, and I just added lime juice and salt to a cup and mixed it well, then mixed it into the cookie dough, and the cookies came out really good.

Adding oats and nuts help to lessen the sweetness of the batter :)

I tried adding oats to store bought coookie-dough, but it didnt help reduce the sweetness, chopped almonds and walnuts worked very well. I think I'll try adding lemon, or cayenne next.